Nut-lock.



J. L'ACHANGB.

NUT LOOK. APPLIGATION FILED JAN. 24,"1913.

A Patented 001.2219111 Attorneys ommen STATES PATE-NT lornron.

Josnrn momen, 'or1BEaUcEv1LLE', QUEBEC., CANADA, Assioma or ONE- HALF To Josnr'n- A, suonano, or MONTREAL, cnn-Aon.

Numancia taugen.

Specification of Letters Patent "Patented oct. 27, 1914.

Application led January 24, 1913. Serial No. 743,934.

To allw'hom it may concern 'Be it known that I, Josnrn LAGHANCE, a subject of the King of `Great Britain, residing at Beauceville, Province of' Quebec,

teeth into engagement with the bolt threads,

panying drawings forming .part of the present application.

'Iliuoughoutl the several figures of the drawings like reference characters designate the same parts. j

.In the drawings: Figure 1 is a side ele. vation, as 'applied-g Fig. is. a top plan view; Fig. 3 is a cross-section on line'3-3 of Fig. 1,'with the dog in operative position; and Fig. 4 is'a like viewvvith the dogin inoperative position.

'- Referring to the drawings in detail, 1 in- -dicates a nut provided with a wide cut extending through one face from theoutside to and into the threadedbore for the bolt. In this cut is pivotally mounted -a'dog 2 having bolt engaging teeth 3, a `rectangular shoulderI 4,.and a notch '5.' Aleaf spring 6 with a curved. free end 7 bears upon the dog 2 and keeps it in operative position, as in Fig.` 3. spring are 'such as to-have the tip bear upon the side of the shoulder 4 at a point just beyond thepivot or fulcrum and force the normally. The teeth are adapted to engage the threads 'only when the4 nut is being turned off orunscrewed, Whereas, they permitthe threads to pass freely when the nut is being ,turned on. Therefore, in order to remove the nut, it is necessary to hold the dog in the inoperative position of Fig. 4. is accomplished by forcing the dog The'- length and position of the- 'back .from theposition of Fig. '3 to that of .F ig. 4,- against the action of the spring. As 1t reaches the position of Fig. 4, the'flat part of the .springnear the tip will bear on the vadjacent face of the rectangular -shoulder 4 -and the curved` tip willv extenddownV into the notch 5. Thus, the dog will be securely held in inoperative position `'and can be returned to operative position'only'by pressure counteracting the force of the spring. In order to limit the outward movementlof the dog and the free end of the' spring,

stop lugs v8v are provided, struck'up from the. opposite edges of the cut. .The lixed'or sta-- tionary en d of the spring is held in position by means of lugs 9 similarly'forr'ned.\

It is thought that the construction, operaf tion', and use 'of the invention will be clear fromI the preceding detailed description.

Having thus 4fully deScribedmy-invention, what I claim as new and desire to se cure by Letters Patent is:

In a device of the character described; nut provided with a'cut extending from its periphery through the bolt passage; a toothed dog pivotally mounted in said cut and adapted to be projected into the .bolt passage, said dog being o erative in an are of 45?, and having'afrec angular shoulder, and a notch adjacent thereto; limitingV lugs struck up from eachv face ofthe cut oppo site the dog; and aleaf "spring secured'. in

ysaid cut andprovided 'with a curved end adapted toI press on the outer face of the rectangular 4shoulder of the dog, at a' single point beyond the pivotal 'point theref to hold the djog in operative position, the said curved' end .of the spring 4being-adaptedto .t around the corner and into the notch of 'the dog to hold it in inoperative position,

and to coperate with theaforementioned lugs to prevent projection of the dog beyond the side of the nut. i?

Inwitness whereof. vI have hereunto` set my hand in the presence of two witnesses. JOSEPH LACIIAITCE.

Witnesses :I

- J. Erma.' BmAm),

C. F. MORIN.,

sol 

